New dad Matthew also shared the exciting news on his Instagram page, writing, “We welcome a beautiful daughter, little sister and best friend for life. Could not possibly be more grateful for our growing family.”

Baby Banks is 31-year-old Hilary’s second child. She also shares a six-year-old son, Luca Cruz Comrie, with her ex-husband Mike Comrie.

After sharing the news of her daughter’s birth, the Younger actress also shared a photo of her daughter on her Instagram stories.

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Hilary and her musician boyfriend Matthew have had an on-and-off again relationship for some years but rekindled their relationship last December after breaking up that March. The pair announced that they were expecting back in June.

“Guess what guys! @matthewkoma and I made a little princess of our own and we couldn’t be more excited!!!!!!” the former Lizzie McGuire star wrote on Instagram at the time.

Hilary also shared footage from the couple's gender reveal party, where they discovered they were having a girl.

“I was so nervous beforehand because I thought for sure I was going to have a boy,” Hilary told Ryan Seacrest on his radio show. “I have a boy already, which would have been great, and I’m obsessed with Luca, but I just wanted one of each.”